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Найдено 339 документов по запросу «DESDynI». [Перейти к поиску]


Дата загрузки: 2016-11-23
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0.29/5
DESDynI Lidar for Solid Earth Applications ...-As part of the NASA's DESDynI mission, global elevation profiles from... the primary objective of the DESDyni-Lidar is the recovery of... the moderate resolution multi-beam DESDynI-Lidar into processing of SAR... an excellent setting for testing DESDyni capabilities to recover fundamental parameters... DESDyni-Lidar calculated ground tracks (Fig. 1). We used a single pass of DESDynI... terrace surfaces (I·IV) and the DESDynI-Lidar (NE-SW) ground tracks... laser energy, we generated pseudo-DESDynI waveforms from the last return... of even the medium footprint DESDynI-Lidar data over the standard... the Sullivan anticline. Additionally, the DESDynI-Lidar derived elevation profiles will... images. A. Centroid elevations along jive DESDynI-Lidar ground tracks The centroid... waveform has been simulated assuming DESDynI-like parameters for the observations... optimum orientation for future roughly N-S DESDynI-Lidar ground tracks (Fig. 1). The... Bay. The significance of the DESDynI-Udar simulations is that surface... hard to discern in the DESDynI-Udar elevation profiles. B. Future steps... the terraces To simulate the DESDynI-Lidar waveforms from aircraft point... systems such as LVIS and DESDynI-Lidar is that is it... EARTHQUAKE As summarized in the DESDynI Science Definition Document, "in areas... above, we simulated waveforms along DESDynI-Lidar ground tracks over the... great earthquakes with just one DESDynI-Udar pass assuming a 5 laser beam...-earthquake DEM along with the DESDynI Udar over the region. Alternatively... Report of the DESDynI Applications Workshop [11]. V. SUMMARY Since DESDynI-Lidar would...-slip event in southern Alaska, DESDynI-Udar could provide new and... off-nadir pointing to previous DESDynI-Udar transects. We have found... Lidar as part of the DESDynI mission. REFERENCES [1] J.B. Blair, J. Ranson, R. Dubayah... Structure, and Dynamics of Ice (DESDynI), A NASA Mission in the NRC..., and J. Rundle, Report of the DESDynI Application Workshop, 2009. 4



Дата загрузки: 2016-11-23
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0.2/5
DESDYNI LIDAR FOR SOLID EARTH APPLICATIONS J.... the primary objective of the DESDynI-Lidar is recovery of the... earlier study we generated pseudo DESDynI waveforms with high correlation (Figure... point cloud data to generate a DESDynI like waveforms and a modified post... an excellent setting for testing DESDynI capabilities to recover fundamental parameters... optimum orientation for future roughly N-S DESDynI-Lidar ground tracks. The terraces... the NCALM data along the DESDynI-Lidar calculated ground tracks. An... EARTHQUAKE As summarized in the DESDynI Science Definition Document, “in areas.... Here we simulated waveforms along DESDynI-Lidar ground tracks before and... “after” waveforms. For the future DESDynI -Lidar acquisitions, we will need... Report of the DESDynI Applications Workshop11. 5. SUMMARY Since DESDynI-Lidar would penetrate...-slip event in southern Alaska, DESDynI-Lidar could provide new and... some offnadir pointing to previous DESDynI-Lidar transects. We have found... Lidar as part of the DESDynI mission. 6. REFERENCES [1] J.B. Blair, J. Ranson, R. Dubayah...]DESDynI Science Study Group, Deformation, Ecosystem Structure, and Dynamics of Ice (DESDynI..., and J. Rundle, Report of the DESDynI Application Workshop, 2009.



Дата загрузки: 2016-11-23
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0.17/5
PolInSAR Methods For Ecosystem Science 2011 Carbon Cycle & Ecosystems Joint Meeting 1 Introduction & Motivation !!Ecosystem structure scientists (especially on ESWG) exposed frequently to PolInSAR via DESDynI !!Considerable uncertainty about efficacy of PolInSAR led to no ecosystem requirements on the InSAR segment of previous DESDynI mission !! !! !! !! Lack of US ecosystem community experience with polInSAR Lack of peer-reviewed papers Lack of access to airborne and field data sets to assess utility Great worry over temporal decorrelation 2 Introduction & Motivation !!DESDynI Science Steering Group (DSSG) and broader ESWG recognized the potential of PolInSAR !! Terrestrial Ecology funded exploration of algorithm development and field experiments (UAVSAR/LVIS joint deployments). !!Discussion about a potential joint PolInSAR mission with DLR (TANDEM-L) with previous DESDynI mission !! Development of draft science requirements !! Draft statement from AGU 2010 meeting "! “The Ecosystem Structure team strongly supports the pursuit of Tandem-L in the DESDynI Project” 3 Introduction & Motivation !!Cancellation of DESDynI lidar unfortunate and helped motivate the present meeting !! “Our community’s options for structural measurements in the near!! term have been much constrained during the past year, and we need to be able to understand and assess our remaining options.” Community examining potential/efficacy of ICESAT2 for vegetation structure -> great uncertainty !!Progress on potential joint missions (e.g. BIOMASS & TANDEML) predicated on mutual understanding and comprehension !!Joint science meeting is long overdue !! Potential joint experiment would be be exceptionally useful !!First step in all these activities is exposure of US ecosystem community to potential of PolInSAR 4 NASA’s Proposed DESDynI* Mission Radar designs for proposed DESDynI mission being studied in pre-Phase A TDRSS downlink L-band 5-80 MHz BW Quad-pol Radar 9-15 m mesh reflector 12-24 element transmit and receive array 12-24 dual-pol receive channels 180-360 km swath, full res, full-pol Better than -25 dB NES0 at 20 MHz BW !"#$"%&'()("*+,-./0,&1(#2,3%34*.($4-5245-*1(/&6("%&/.723(,+('2*( Pre-decisional – for Planning and Discussion Purposes Only! January 2011 MCR DESDynI Concept Must be re-thought Due to Current OMB Direction L-band Polarimetric SAR ? Ecosystem Structure Canopy Height! Biomass! Biomass, Vegetation Structure, Effects of changing climate on habitats and CO2,, disturbance ? ? ? Multibeam Profiling LIDAR Cryosphere Ice velocity, thickness Response of ice sheets to climate change & sea level rise L-band Repeat Pass InSAR Solid Earth Surface Deformation Geo-Hazards Water Resource Management 91-day repeat ~370 km orbit 25 m spot 5 beams Pass 1 Pass 2 Two spacecraft not at same scale ? 13 day repeat ?~600 km orbit 250-500 m orbit control ? 220 km swath Full resolution over swath MHz modes ? 5,20+5,40,80 SP, DP, QQP, QP modes 3 -6 Outlook for DESDynI •! President’s FY12 Budget Proposal (February 2011) reset the go- forward plan for DESDynI –! Lidar mission to be contributed, not funded by NASA –! Radar mission to be implemented more affordably •! NASA continues to invest in DESDynI –! Forming a Science Definition Team –! Continuing trade studies at JPL •! NASA is currently exploring options for reducing cost –! Reducing number and scope of science requirements levied on DESDynI ! DESDynI in combination with other satellites to approach DESDynI requirements –! Find international partners interested in the science and technology ! Ongoing Tandem-L studies with DLR ! Ongoing discussions with several potential partners –! Find domestic partners that would increase utility of DESDynI data 7 Possibilities with PolInSAR – an SRTM analogy •! Prior to SRTM, most users were familiar with quality and character of topography derived from optical stereo •! Despite a concerted effort, attempts to produce uniform high-quality global topography were unsuccessful •! SRTM was selected as a practical alternative to previously attempted methods to fill the gap in global topography –! Sponsors recognized that the data characteristics would be different from optical stereo •! SRTM is now a widely used data sets for science and applications –! Some of its unique qualities (e.g. “electrical height”) are being exploited for canopy height and biomass studies •! Similarly, PolInSAR may be able to fill a gap in global estimates of above-ground biomass and forest structure •! PolInSAR is an extension of SRTM techniques, estimating a number of heights in the canopy to infer structure. 8



Дата загрузки: 2017-02-23
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0.16/5
... the earthquake cycle GPS InSAR (DESDynI) Geophysical Sensor Web Portlet Summary... Database Interferogram Fault Data 20 DESDynI Mission Deformation, Ecosystem Structure, and...-height accuracy of 1 m Observation Techniques DESDynI is defined by the decadal... is on Deformation Objectives for DESDynI Determine the likelihood of earthquakes... modes High data volumes for DESDynI drive new paradigm for data... QuakeSim to DESDynI Mission Design Measurement Requirements Validate that DESDynI will meet the science objectives Assess the quality of DESDynI... sensitivity analysis Data Volume for DESDynI DESDynI data volume is an order... Expansion factor is 5.2 for all DESDynI data products Processed data 29... Can Serve as Prototype for DESDynI Data Processing We are deploying... operational TeraGrid Supercomputing Resources 30 DESDynI Deformation Data Analysis QuakeSim integrates... Will provide computational infrastructure for DESDynI data analysis and interpretation GeoFEST... End-to-End Flow Data DESDynI InSAR Data HPC Processing Center... deformation InSAR portion of the DESDynI mission Developing Grid services with...



Дата загрузки: 2017-11-24
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0.07/5
... and Dynamics of Ice satellite (DESDynI). Two new SAR  satellites that... revolutionize mapping of forest  biomass. DESDynI will be the first combined... LIDAR satellite launches, such  as DESDynI, BIOMASS, and SAR constellations, are... volume/biomass estimation.   e These include DESDynI and BIOMASS. Innovations in processing..., and  Dynamics of Ice Satellite (DESDynI) mission    Note: Example footprints are..., or DESDynI), and potentially a P‐band interferometric sensor (BIOMASS).  Of these, DESDynI, GLAS... inform forest  measurement and monitoring. DESDynI would be the first integrated... the ICESat‐II and DESDynI LIDAR satellites. DESDynI is a satellite mission planned... come from an InSAR satellite (DESDynI) and several  formation SAR constellations...; ESA 2009). The GLAS and  DESDynI LIDARs will improve global DEMs...‐baseline Tandem‐L companion satellite for  DESDynI may be launched in the... is the main concept  behind DESDynI, the InSAR‐LIDAR satellite mission.... in review). The BIOMASS and DESDynI  missions (P‐band and L‐band, respectively... al. 2008). The launch of DESDynI promises to increase  this new... data, but both ICESat and DESDynI will collect data at coarse... of the ICESat‐2 mission, the DESDynI  and BIOMASS missions, and the... with the expected launch of DESDynI in 2015 and the  potential... InSAR and the GLAS and DESDynI footprint  archives will markedly improve... Satellites for Mediterranean Basin Observation  DESDynI  Deformation, Ecosystem Structure and Dynamics... quality, moderate‐resolution  hyperspectral sensor.  DESDynI (NASA)  2015  USA LIDAR & InSAR... structure, and dynamics of ice (DESDynI). Paper presented  at the ESRI... Spacecraft Configuration  Studies (Priority Tasks 1, 2, & 4). DESDynI Science Study Group Meeting. June...



Дата загрузки: 2016-11-23
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0.18/5
... Radar Processing Concepts for the DESDynI Mission Yunling Lou, Steve Chien... June, 2010 Arlington, Virginia 1 Agenda •  DESDynI mission measurements overview •  Benefits of... of onboard products •  Future work 2 DESDynI Mission Measurements Overview Polarimetric SAR... Repeat Pass InSAR Pass 2 Pass 1 DESDynI will exploit an L-band polarimetric... Dynamics Changes in Earth’s Surface DESDynI ‐ Deforma/on, Ecosystem Structure, and... Advantages of Onboard Processing for DESDynI Mission   DESDynI Radar is an L-band... of Onboard Processing Technology for DESDynI Mission Solid Earth Desired Repeat... for DESDynI Mission’s Radar Instrument Onboard Processor Onboard Autonomy Software DESDynI Analyze...



Дата загрузки: 2017-06-14
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0.16/5
... become available with NASA’s planned DESDynI sensor. However, substantial challenges remain... Structure, and Dynamics of Ice (DESDynI), http://desdyni.jpl.nasa. gov/ [Donnellan... globe. The mission concept for DESDynI envisions a combination of LiDAR sensors... the transects that ICESAT and DESDynI data are, or will be... expected from a spaceborne mission, like DESDynI. The question is if the... systems, such as the proposed DESDynI sensor, thus have the potential... active remote sensors, such as DESDynI. The resolutions at which these... the sensor used (LiDAR, Landsat, DESDynI, etc.), our study highlights the... structure, and dynamics of ice (DESDynI), in Proceedings of IEEE Aerospace...



Дата загрузки: 2017-11-24
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0.07/5
... on technical considerations alone. CLARREO, DESDynI and selected Decadal Tier 2 and... will be accelerated; CLARREO and DESDynI may launch as soon as... Structure, and Dynamics of Ice (DESDynI), for accelerated launches in CY...-B and initiate the spacecraft contract; - DESDynI and CLARREO will enter in... initiated, allowing dual-launch of DESDynI Radar and Lidar spacecraft; and... Tier-1 systematic missions (SMAP, ICESAT-2, DESDynI, and CLARREO) for launch by...-2), and late CY 2017 (CLARREO, DESDynI). ESMP activities will increase consistent...-B and initiate the spacecraft contract; - DESDynI and CLARREO will enter in... late CY 2017 of the DESDynI Radar and Lidar spacecrafts. The... Ice (DESDynI) The Deformation, Ecosystem Structure, and Dynamics of Ice (DESDynI) mission... of a scientifically and programmatically focused DESDynI mission for a late CY 2017... EELV launch vehicle. The overall DESDynI radar/lidar mission will greatly... stresses in the solid Earth. DESDynI will enter into formulation at...



Дата загрузки: 2017-09-24
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0.18/5
DESDynI Pre-Project Study Team Jet ... 11 February 2009 ✦  DESDynI Mission Sciences ❑  ❑  ❑  ✦  15m reflector S/C bus DESDynI Instrumentation ❑  ❑  ❑  ✦  Deformation... precision orbit determination and reconstructions DESDynI Implementation Challenges ❑  ❑  ❑  ❑  ❑  ❑  Accommodating multi-beam...) ❑  MCR Project Documents (Sep 2009) DESDynI – 2 ✦  Perform pre-phase A study with.../GSFC concurrent design/costing capabilities DESDynI – 3 Conduct application workshops for community... be in collaboration with DLR DESDynI – 4 Payload InSAR, Lidar, GPS Orbit... January 12-15, 2009 LIDAR DESDynI – 55 Lidar Free-Flyer Ultra... w/ margin) January 12-15, 2009 DESDynI – 66 Lidar Free-Flyer Ultra...-15, 2009 Radar Free-Flyers DESDynI – 77 RADAR Reflector: 15m diameter... UAVSAR antenna as basis for DESDynI feed; needs engineering and packaging... and a wall thickness of 2.5mm DESDynI – 8 Titanium Flexures HOMER Laser •  Breadboard... requirement for repeat-pass InSAR DESDynI – 10 ✦  Early requirements and designs... as matured Results documented ❑  ❑  DESDynI Website – desdyni.jpl.nasa.gov, to capture... for unreleased documents DESDynI – 11 Meetings and Workshops Held ✦  ✦  ✦  ✦  ✦  ✦  ✦  ✦  ✦  ✦  ✦  ✦  ✦  DESDynI/TanDEM Technical Interchange Meeting (TIM) @JPL 4/7-8/08 DESDynI Working Group Meeting @ GSFC 6/5-6/08 DESDynI/TanDEM TIM @DLR 6/5-6/08 DLR Science Meeting 6/9/08 DESDynI/TanDEM TIM @Boston, following IGARSS 7/17-19/08 DESDynI Science/Working Group Meeting @Greenbelt 10/14-15/08 DESDynI... or consider putting DESDynI lidar on ICESat-II platform DESDynI Application Workshop... from multi-agency application users DESDynI/TanDEM TIM and Science Meeting... instrument 11/17-11/21 DESDynI/TanDEM TIM @JPL 1/8-9/09 TEAM... LIDAR platform 1/26-29/09 DESDynI – 12 DESDynI – 13 Lidar off-pointing... SAR NASA/DLR DESDynI/TanDEM-L TIM-6 1/8-9/08 ICESAT/DESDynI Meeting 10/16... 9/24/09 KDP-A 1/15/10 DESDynI – 14 ✦  Single (with gimbaled lidar... of MCR products, reduce risk DESDynI – 15 ✦  Opportunities for joint development... Design and architecture of SMAP, DESDynI, SWOT, (XOVWM) radar hardware ♦  ♦  Principal... missions such as DESDynI, SWOT, HyspIRI, LIST. ❑  ❑  SWOT and DESDynI: possible shared... Radar and lidar data fusion DESDynI – 16 ✦  What is StripSAR? ❑  ❑  ❑  ✦  Standard... beam DESDynI – 20 ✦  Instrument development technical activities Mission (~Launch) SMAP (13) DESDynI... activities Mission (Launch?) SMAP (13) DESDynI (15) DFS (17) SWOT (17... or ice motion Vegetation structure DESDynI 23– 23 ✦  Pre-Phase Study... from NPR 7120.5D WBS) DESDynI Pre-Project Study 1.0 Study Management... platforms (radaronly and lidar-only) DESDynI – 24 ✦  ✦  Per NASA Procedure Requirement... Report Project and Program Recommendations DESDynI implementation schedule (to be assessed...-39 months Phase E: 60 months DESDynI – 25 Configuration and Concept Features... (Mbps) 160/170/200 400 DESDynI – 26 Configuration •  Lasers, Telescope, Gyro... reflector S/C bus X LIDAR Radar Feed DESDynI – 27 Features of the Instrument...



Дата загрузки: 2017-11-24
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0.07/5
... Structure, and Dynamics of Ice (DESDynI) Radar satellite. Two climate-focused... will be completed for the DESDynI mission, with the NASA effort... for the Lidar element. The DESDynI launch date will be determined...-B and initiate the spacecraft contract; - DESDynI will complete its Phase A formulation... 2016, respectively. A third Tier I mission, DESDynI, will complete its pre-formulation...-2. The launch plans for the DESDynI mission will be informed by...) and complete its confirmation review; - DESDynI will complete its pre-Phase... Structure, and Dynamics of Ice (DESDynI) The DESDynI mission is a Tier-1 decadal... two separate spacecraft. The overall DESDynI radar/lidar mission will greatly... pre-formulation activities for the DESDynI mission, with the studies focused... manages OSTM, ACRIMSat, SMAP, QuikSCAT, DESDynI, CLARREO, and Jason. Project Management... TBD ICESat-2 GSFC GSFC TBD DESDynI JPL JPL, GSFC TBD CLARREO...